Summary of Significant Accounting Policies	6 Months Ended
Jun. 30, 2026
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited Condensed Consolidated Financial Statements include the accounts of Collegium Pharmaceutical, Inc. (a Virginia corporation) and its subsidiaries. The Condensed Consolidated Financial Statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial reporting and as required by Regulation S-X, Rule 10-01. Accordingly, they do not include all of the information and footnotes required by GAAP for complete consolidated financial statements. In the opinion of the Company’s management, the accompanying unaudited Condensed Consolidated Financial Statements contain all adjustments (consisting of items of a normal and recurring nature) necessary to fairly present the financial position of the Company as of June 30, 2026, the results of operations for the three and six months ended June 30, 2026 and 2025, and cash flows for the six months ended June 30, 2026 and 2025. The results of operations for the three and six months ended June 30, 2026 are not necessarily indicative of the results to be expected for the full year. The preparation of the Condensed Consolidated Financial Statements in accordance with GAAP requires the Company to make estimates and assumptions that impact the reported amounts of assets, liabilities, revenues, costs and expenses and the disclosure of contingent assets and liabilities in the Company’s Condensed Consolidated Financial Statements and accompanying notes. Estimates in the Company’s Condensed Consolidated Financial Statements include revenue recognition, including the estimates of product returns, discounts and allowances related to commercial sales of products, estimates related to the fair value of assets acquired and liabilities assumed in business combinations, including acquired intangible assets and the fair value of inventory acquired, estimates of the fair value of contingent consideration related to business combinations, estimates utilized in the ongoing valuation of inventory related to potential unsaleable product, estimates of useful lives with respect to intangible assets, accounting for stock-based compensation, contingencies, impairment of goodwill and intangible assets, future payments under the deferred royalty obligation, and deferred tax valuation allowances. The Company bases estimates and assumptions on historical experience when available and on various factors that it believes to be reasonable under the circumstances. The Company evaluates its estimates and assumptions on an ongoing basis. The Company’s actual results may differ from these estimates under different assumptions or conditions. The interim Condensed Consolidated Financial Statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s most recently filed annual report on Form 10-K for the fiscal year ended December 31, 2025 (the “Annual Report”). There were no significant changes in the Company’s significant accounting policies from those described in the Company’s Annual Report. Recently Adopted Accounting Pronouncements New accounting pronouncements are issued periodically by the Financial Accounting Standards Board (“FASB”) and are adopted by the Company as required by the specified effective dates. In January 2026, the Company adopted ASU 2024-04, Debt—Debt with Conversion and Other Options (Subtopic 470-20): Induced Conversions of Convertible Debt Instruments. The amendments clarify the requirements for determining whether certain settlements of convertible debt instruments should be accounted for as induced conversions. The adoption of this guidance did not have a material impact on the Company’s Condensed Consolidated Financial Statements during the six months ended June 30, 2026. Recently Issued Accounting Pronouncements Not Yet Adopted In November 2024, the FASB issued ASU 2024-03, Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures (Subtopic 220-40). The amendments in this update require disclosure of specified information about certain costs and expenses. This update is effective for annual periods beginning after December 15, 2026. The Company is currently evaluating the effect of adopting this guidance on its consolidated financial statements. Other recent accounting pronouncements issued, but not yet effective, are not expected to be applicable to the Company or have a material effect on the consolidated financial statements upon future adoption.

The accompanying unaudited Condensed Consolidated Financial Statements include the accounts of Collegium Pharmaceutical, Inc. (a Virginia corporation) and its subsidiaries. The Condensed Consolidated Financial Statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial reporting and as required by Regulation S-X, Rule 10-01. Accordingly, they do not include all of the information and footnotes required by GAAP for complete consolidated financial statements.

In the opinion of the Company’s management, the accompanying unaudited Condensed Consolidated Financial Statements contain all adjustments (consisting of items of a normal and recurring nature) necessary to fairly present the financial position of the Company as of June 30, 2026, the results of operations for the three and six months ended June 30, 2026 and 2025, and cash flows for the six months ended June 30, 2026 and 2025. The results of operations for the three and six months ended June 30, 2026 are not necessarily indicative of the results to be expected for the full year.

The preparation of the Condensed Consolidated Financial Statements in accordance with GAAP requires the Company to make estimates and assumptions that impact the reported amounts of assets, liabilities, revenues, costs and expenses and the disclosure of contingent assets and liabilities in the Company’s Condensed Consolidated Financial Statements and accompanying notes. Estimates in the Company’s Condensed Consolidated Financial Statements include revenue recognition, including the estimates of product returns, discounts and allowances related to commercial sales of products, estimates related to the fair value of assets acquired and liabilities assumed in business combinations, including acquired intangible assets and the fair value of inventory acquired, estimates of the fair value of contingent consideration related to business combinations, estimates utilized in the ongoing valuation of inventory related to potential unsaleable product, estimates of useful lives with respect to intangible assets, accounting for stock-based compensation, contingencies, impairment of goodwill and intangible assets, future payments under the deferred royalty obligation, and deferred tax valuation allowances. The Company bases estimates and assumptions on historical experience when available and on various factors that it believes to be reasonable under the circumstances. The Company evaluates its estimates and assumptions on an ongoing basis. The Company’s actual results may differ from these estimates under different assumptions or conditions. The interim Condensed Consolidated Financial Statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s most recently filed annual report on Form 10-K for the fiscal year ended December 31, 2025 (the “Annual Report”).

In January 2026, the Company adopted ASU 2024-04, Debt—Debt with Conversion and Other Options (Subtopic 470-20): Induced Conversions of Convertible Debt Instruments. The amendments clarify the requirements for determining whether certain settlements of convertible debt instruments should be accounted for as induced conversions. The adoption of this guidance did not have a material impact on the Company’s Condensed Consolidated Financial Statements during the six months ended June 30, 2026.

In November 2024, the FASB issued ASU 2024-03, Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures (Subtopic 220-40). The amendments in this update require disclosure of specified information about certain costs and expenses. This update is effective for annual periods beginning after December 15, 2026. The Company is currently evaluating the effect of adopting this guidance on its consolidated financial statements.